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简介：一个串联缓冲区基于在半导体的非线性的极化旋转，光放大器被建议，它对在微微秒的缓冲时间的快重构合适。与建议缓冲区，六十不同缓冲区时间在2.5Gb/s被表明。

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简介：Weproposeandexperimentallydemonstrateanoveltypeofpolarizationrotatorthatiscapableofrotatingthepolarizationplaneofalinearlypolarizedlightatanydesiredangleineitherbroadornarrowspectralbandwidth.Therotatorcomprisesanarrayofstandardhalf-waveplatesrotatedatspecificangleswithrespecttotheirfast-polarizationaxes.Theperformanceoftherotatordependsonthenumberofindividualhalf-waveplates,andinthispaperweexperimentallyinvestigatetheperformanceoftwocompositerotatorscomprising6and10half-waveplates.

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简介：Amplitude,phaseandpolarizationareessentialparametersofanopticalfield.Inthepastdecade,withtheenhancementoftechniquesinmanipulatingphaseandpolarizationstatesincomplexopticalfields,opticalvorticesandvectorbeamsareinvestigatedinacloselycoupledfashionintermsofefficientbeamgenerationandmanipulation,stabletransmissionandnoveldetectionaimedatvariousapplications.Inthisspecialissue6invitedpapersdemonstrateanumberoftypicaltopicsinthefield,withemphasisonthevectorialbeamgenerationandopticalcommunicationsystemsutilisingorbitalangularmomentum(OAM).

简介：Opticalvorticesastopologicalobjectsexistubiquitouslyinnature.Inthispaper,bymakinguseoftheDuan'stopologicalcurrenttheory,weinvestigatethetopologyintheclosedandknottedopticalvortices.Thetopologicalinnerstructureoftheopticalvorticesareobtained,andthelinkingoftheknottedopticalvorticesisalsogiven.

简介：Asakindoftwo-dimensionaltransitionmetaldichalcogenidematerial,tungstendiselenide(WSe2)hasattractedincreasingattention,owingtoitsgappedelectronicstructure,relativelyhighcarriermobility,andvalleypseudospin,allofwhichshowitsvaluablenonlinearopticalproperties.TherearefewstudiesonthenonlinearopticalpropertiesofWSe2andcorrelationwithitselectronicstructure.Inthispaper,theeffectsofspatialself-phasemodulation(SSPM)anddistortioninfluenceofWSe2ethanolsuspensionsaresystematicallystudied,namely,thenonlinearrefractiveindexandthird-ordernonlinearopticaleffect.WeobtainedtheWSe2dispersionsSSPMdistortionformationmechanism,andthroughit,wecalculatedthenonlinearrefractiveindexn2,nonlinearsusceptibilityχ3,andtheirwavelengthdependenceundertheexcitationof457nm,532nm,and671nmlasers.Moreover,byuseofitsstrongandbroadbandnonlinearopticalresponse,all-opticalswitchingoftwodifferentlaserbeamsduetospatialcross-phasemodulationhasbeenrealizedexperimentally.Ourresultsareusefulforfutureopticaldevices,suchasall-opticalswitchingandall-opticalinformationconversion.

简介：Wedemonstratedlong-periodgrating(LPG)inscriptiononpolymerfunctionalizedopticalmicrofibersanditsapplicationsinopticalsensing.Opticalmicrofiberswerefunctionalizedwithultraviolet-sensitivepolymethylmethacrylatejacketsand,thus,LPGscouldbeinscribedonopticalmicrofibersviapoint-by-pointultravioletlaserexposure.Fora2mmlongmicrofiberLPG(MLPG)inscribedonopticalmicrofiberswithadiameterof5.4μm,aresonantdipof15dBat1377nmwasobserved.ThisMLPGshowedahighsensitivityofstrainandaxialforce,i.e.,-1.93pm∕μεand-1.15pm∕μN,respectively.AlthoughtheintrinsictemperaturesensitivityoftheLPGsisrelativelylow,i.e.,-12.75pm∕°C,itcanbeincreasedtobe-385.11pm∕°Cbyappropriatesealing.Benefitingfromthesmallfootprintandhighsensitivity,MLPGscouldhavepotentialapplicationsinopticalsensingofstrain,axialforce,andtemperature.

简介：Opticalmicrocavitieshaveattractedtremendousinterestinbothfundamentalandappliedresearchinthepastfewdecades,thankstotheirsmallfootprint,easyintegrability,andhighqualityfactors.Usingtotalinternalreflectionfromadielectricinterfaceoraphotonicbandgapinaperiodicsystem,thesephotonicstructuresdonotrelyonconventionalmetal-coatedmirrorstoconfinelightinsmallvolumes,whichhavebroughtforthnewdevelopmentsinbothclassicalandquantumoptics.Thisfocusissueshowcasesseveralsuchdevelopmentsandrelatedfindings,whichmaypavethewayforthenextgenerationofon-chipphotonicdevicesbasedonmicrocavities.

简介：Weproposeanovelsiliconopticalphaseshifterstructurebasedonheterogeneousstrip-loadedwaveguidesonaphotonicsilicononinsulator(SOI)platform.ThefeaturesofanetchlessSOIlayerandloadedstripwouldenhancetheperformanceanduniformityofsiliconopticalmodulatorsonalarge-scalewafer.WeimplementedthephaseshifterbyloadinganamorphoussiliconstripontoanSOIlayerwithaverticalPNdiodestructure.ComparedtotheconventionallateralPNphaseshifterbasedonhalf-etchedribwaveguides,thisphaseshiftershowsa>1.5timesenhancementofmodulationefficiencyandprovides>20GHzhigh-speedoperation.

简介：我们将讨论你怎么能与一台便携式、小的设备考虑到厚度和折射索引测量玻璃性质并且它怎么基于一个光理论工作。你能使用的主要工业它是空气工业(为飞机窗户和大楼和构造)。因此，进玻璃性质的探查用各种各样的实际应用是很有意义的。

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简介：Weinvestigatethenonlineardynamicsofmulti-dimensionalopticalpulsespropagatinginanisotropicselfdefocusingmedium,Usingamethodofmultiple-scalesweshowthatthenonlinearevolutionofthepulsesisgovernedbyDavey-Stewartsonequations.Dromion-likenonlinearlocalizedstructures(high-dimensionalOpticalsolitons)excitedfromacontinuouswavebadckgroundanddecayinginallspatialdirectionsarepredictedthroughtheinteractionbetweenawavepacketsuperposedbyshort-wavelengthcomponentsandalong-wavelengthmeanfieldgeneratedbyanopticalrectification.

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简介：ThecomparativenumericalandanalyticalanalysisofscintillationindicesofthevortexLaguerre–GaussianbeamandthenonvortexdoughnutholeandGaussianbeamspropagatingintherandomlyinhomogeneousatmospherehasbeenperformed.Ithasbeenfoundthatthedependenceofthescintillationindexattheaxisoftheopticalvortexontheturbulenceintensityatthepathhastheformofaunitstep.Ithasbeenshownthatthebehaviorofscintillationsinthecrosssectionsofvortexandnonvortexbeamsdifferswidely.DespitethescintillationindexofvortexbeamshasbeencalculatedonlyforthesimplestLG10mode,theobtainedresultsarequitegeneral,becausetheydemonstratethemainpropertiesinherentinscintillationsofvortexbeamsofanytype.

简介：Anarrowbandtunableantireflectionopticalfilterisproposedandnumericallystudied.Thestructureisametasurfacebasedonplasmonicnanoparticlesonanelectro-opticfilminathree-layerconfigurationofmetaldielectric-metal（MDM）inthevisiblenear-infraredrange.BytuningthevoltageandthustuningtherefractiveindexofthedielectricLiNbO3,onecanshiftthewavelengthofminimumreflectionasdesired.Theparametersofgoldnanoparticlesandotherelementsusedforthefilterdesignandrefractiveindexofthedielectricareobtainedbythefinite-elementmethod（FEM）.AnanalyticaltheoryispresentedtoexplaintheFEMsimulationresults,andtheyagreewellwitheachother.ItisfoundthatthefrequencyoftheplasmonicresonancewaveonthemetasurfaceshouldbeequaltothatoftheFabry–PerotresonatorformedbytheMDMtohaveagoodfilteringproperty.TheoreticalspectraobtainedbyFEMsimulationshowthatthestructurehasextensivepotentialforthedesignoftunablenarrow-bandfiltersformodulators,displayers,andcolorextractionforimaging.

简介：MuonsproducedbytheBethe–HeitlerprocessfromlaserwakefieldacceleratedelectronsinteractingwithhighZmaterialshavevelocitiesclosetothelaserwakefield.Itispossibletoacceleratethosemuonswithlaserwakefielddirectly.Thereforeforthefirsttimeweproposeanall-optical‘GeneratorandBooster’schemetoacceleratetheproducedmuonsbyanotherlaserwakefieldtosupplyaprompt,compact,lowcostandcontrollablemuonsourceinlaserlaboratories.Thetrappingandaccelerationofmuonsareanalyzedbyone-dimensionalanalyticmodelandverifiedbytwo-dimensionalparticle-in-cell(PIC)simulation.Itisshownthatmuonscanbetrappedinabroadenergyrangeandacceleratedtohigherenergythanthatofelectronsforlongerdephasinglength.WefurtherextrapolatethedependenceofthemaximumaccelerationenergyofmuonswiththelaserwakefieldrelativisticfactorγandtherelevantinitialenergyE0.Itisshownthatamaximumenergyupto15.2GeVispromisingwithγ=46andE0=1.45GeVontheexistingshortpulselaserfacilities.

简介：Awoofer–tweeteradaptiveopticalstructuredilluminationmicroscope(AOSIM)ispresented.Bycombiningalow-spatial-frequencylarge-strokedeformablemirror(woofer)withahigh-spatial-frequencylow-strokedeformablemirror(tweeter),weareabletoremovebothlarge-amplitudeandhigh-orderaberrations.Inaddition,usingthestructuredilluminationmethod,ascomparedtowidefieldmicroscopy,theAOSIMcanaccomplishhighresolutionimagingandpossessesbettersectioningcapability.TheAOSIMwastestedbycorrectingalargeaberrationfromatriallensintheconjugateplaneofthemicroscopeobjectiveaperture.TheexperimentalresultsshowthattheAOSIMhasapointspreadfunctionwithanFWHMthatis140nmwide(usingawaterimmersionobjectivelenswithNA=1.1)aftercorrectingalargeaberration(5.9μmpeak-to-valleywavefronterrorwith2.05μmRMSaberration).Afterstructuredlightilluminationisapplied,theresultsshowthatweareabletoresolvetwobeadsthatareseparatedby145nm,1.62×belowthediffractionlimitof235nm.Furthermore,wedemonstratetheapplicationoftheAOSIMinthefieldofbioimaging.Thesampleunderinvestigationwasagreen-fluorescentprotein-labeledDrosophilaembryo.Theaberrationsfromtherefractiveindexmismatchbetweenthemicroscopeobjective,theimmersionfluid,thecoverslip,andthesampleitselfarewellcorrected.UsingAOSIMwewereabletoincreasetheSNRforourDrosophilaembryosampleby5×.